<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="a"></div>
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    <div id="c"></div>
    <div id="d"></div>
    <div id="e"></div>
    <div id="f"></div>
    <div id="g"></div>
    <style>
        div{
            border: 1px red solid;
            width: 100px;
            height: 100px;
        }
        #a{background-image:linear-gradient(180deg,aqua,green)}
        #b{background-image: linear-gradient(90deg,yellow,orange,25%,purple);}
        #c{background-image: linear-gradient(54deg,red,orange,yellow,green,blue 50%);}
        #d{background-image: radial-gradient(circle,yellow,green);}
        #e{background-image: radial-gradient(200px 80px,rgb(80,66,5),rgb(5, 80, 30));}
        #f{background-image: repeating-linear-gradient(to bottom,white, silver 30px);}

    </style>
</body>
</html>